A grenade is a small explosive device designed to be thrown by hand or launched from a weapon. It typically contains a casing filled with explosive material and a fuse that ignites the explosive upon impact or after a short delay. Grenades are used in military operations for various purposes, including offensive attacks, defensive measures, and signaling. There are different types of grenades, such as fragmentation grenades, which disperse shrapnel to injure enemies, and smoke grenades, which create a smoke screen for concealment. Grenades are an essential part of modern warfare and are often used by soldiers in combat situations.